Coach Dave Rice said in a statement Thursday that the junior guard was being suspended through the weekend for conduct detrimental to the team.
In addition to sitting out the Nevada game, the 21-year-old would not practice with the team on Thursday or Friday.
Dejean-Jones has started 26 games and is averaging 13.4 points per game.
UNLV (19-11, 10-7 Mountain West) hosts the conference tournament next week.
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